2 files changed, 6 insertions, 43 deletions
diff --git a/packages/gitbook-core/src/models/File.js b/packages/gitbook-core/src/models/File.js
index 03032a1..88138c3 100644
--- a/packages/gitbook-core/src/models/File.js
+++ b/packages/gitbook-core/src/models/File.js
@@ -21,16 +21,14 @@ class File extends Record(DEFAULTS) {
     }
 
     /**
-     * Return url for a file in a GitBook context.
-     * @param {Context} context
-     * @return {String} url
+     * Returns the relative path from this file to "to"
+     * @param {String} to
+     * @return {String}
      */
-    toURL(context) {
-        const { file } = context.getState();
-
+    relative(to) {
         return path.relative(
-            path.dirname(file.path),
-            this.path
+            path.dirname(this.path),
+            to
         );
     }
 
diff --git a/packages/gitbook-core/src/models/SummaryArticle.js b/packages/gitbook-core/src/models/SummaryArticle.js
index 80ef5ae..0f8ca0d 100644
--- a/packages/gitbook-core/src/models/SummaryArticle.js
+++ b/packages/gitbook-core/src/models/SummaryArticle.js
@@ -1,9 +1,4 @@
-const url = require('url');
-const path = require('path');
 const { Record, List } = require('immutable');
-const File = require('./File');
-
-const OUTPUT_EXTENSION = '.html';
 
 const DEFAULTS = {
     title:    '',
@@ -24,36 +19,6 @@ class SummaryArticle extends Record(DEFAULTS) {
     }
 
     /**
-     * Return url for a file in a GitBook context.
-     * @param {Context} context
-     * @return {String} url
-     */
-    toURL(context) {
-        const { readme } = context.getState();
-        const fileReadme = readme.file;
-        const parts = url.parse(this.ref);
-
-        if (parts.protocol) {
-            return this.ref;
-        }
-
-        const file = new File(parts.pathname);
-        let filePath = file.toURL(context);
-
-        // Change extension and resolve to .html
-        if (
-            path.basename(filePath, path.extname(filePath)) == 'README' ||
-            (fileReadme && filePath == fileReadme.path)
-        ) {
-            filePath = path.join(path.dirname(filePath), 'index' + OUTPUT_EXTENSION);
-        } else {
-            filePath = path.basename(filePath, path.extname(filePath)) + OUTPUT_EXTENSION;
-        }
-
-        return filePath + (parts.hash || '');
-    }
-
-    /**
      * Return true if article is an instance of SummaryArticle
      * @param {Mixed} article
      * @return {Boolean}